From 5e51d523e71231cb190e9ed981962df527f4ee7e Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Sun, 4 Apr 2021 13:11:56 +0200
Subject: Add base functionality for hermetic build configurations

---
 libbuild2/variable.cxx | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'libbuild2/variable.cxx')

diff --git a/libbuild2/variable.cxx b/libbuild2/variable.cxx
index 917b9e7..efda63d 100644
--- a/libbuild2/variable.cxx
+++ b/libbuild2/variable.cxx
@@ -1759,6 +1759,14 @@ namespace build2
     return pair<value&, bool> (r, p.second);
   }
 
+  bool variable_map::
+  erase (const variable& var)
+  {
+    assert (!global_ || ctx->phase == run_phase::load);
+
+    return m_.erase (var) != 0;
+  }
+
   // variable_type_map
   //
   lookup variable_type_map::
-- 
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